Clicked on letter in inventory but can't click on Renee with it. I didn't get to talk to the authenticator either and there is nothing in my task list I haven't already done. It's like my game is over early.

I just realized what I did. I used the save on the 3rd wasp puzzle without using the second one so I didn't get the letter, it just showed up in inventory. I will go back and replay the second and then the third save and that should fix the problem. Thanks for the suggestions.

Do you have a save where you do Iggy as the optometrist before the mailman? When I do the mailman first and then use your third save, I can't talk to Renee or the authenticator because I didn't get the letter myself.